Osg 2964000 Spiral Flute Tap M10x1.25 Metric Fine 2 Flute

Product Description

The OSG 2964000 is a spiral flute tap designed for cutting M10x1.25 metric fine internal threads in a modified bottoming chamfer configuration. Manufactured from vanadium high-speed steel with a bright uncoated finish, it delivers consistent thread form in aluminum and similar non-ferrous workpieces. The 50-degree helix angle drives chips up and out of the hole during tapping, reducing packing and breakage risk in blind-hole applications. With an overall length of 2-15/16 inches and a D5 thread limit, this tap suits applications where tight tolerances and controlled thread fit are required. It is typically run on CNC machining centers, tapping heads, or manual tap handles by machinists and tool-and-die professionals.

This tap is suited for blind-hole threading operations in aluminum and other free-machining materials where a modified bottoming chamfer is needed to bring threads as close to the bottom of a hole as possible. The spiral flute design makes it particularly effective in low-clearance or confined setups on vertical machining centers and drill presses. Series 296 from OSG covers metric fine thread taps intended for production environments and precision repair work in aerospace, automotive, and general manufacturing contexts.

Key Features

• M10x1.25 metric fine thread form for tight-tolerance fastener applications
• Modified bottoming chamfer allows threading close to the bottom of blind holes
• 50-degree helix angle evacuates chips efficiently in blind-hole tapping
• Vanadium high-speed steel construction provides wear resistance in aluminum and non-ferrous materials
• Bright uncoated finish maintains sharp cutting edges and suits aluminum applications where coating buildup is a concern
• D5 thread limit for controlled fit and consistent thread tolerance

Compatibility

Designed for use in aluminum per manufacturer specifications. Suitable for standard tap holders and tapping heads accepting a 0.3810-inch shank diameter. Part of OSG Series 296 metric fine spiral flute taps.

Installation Notes

Install in a properly sized tap holder or floating tap collet to prevent thread damage from misalignment. Ensure the pilot hole is drilled to the correct minor diameter for M10x1.25 before tapping. Apply appropriate cutting fluid for the workpiece material; aluminum typically benefits from a light oil or dedicated aluminum tapping fluid. Power down or de-energize the machine spindle fully before changing or inspecting the tap.